TheNameDBMcDermott
PatronymicMeaning
Descendant of Diarmait, meaning free man or without injunction.
Etymology
Derived from the Irish Mac Diarmada, from the personal name Diarmait. The surname is associated with County Roscommon and County Galway.
About the McDermott Surname
McDermott is a Connacht surname with medieval roots in County Roscommon and County Galway. The name is associated with a prominent family that held significant influence in the west of Ireland.
Distribution
Primarily found in Connacht, particularly in County Roscommon, County Galway, and County Leitrim.